SEM and petrographic microscope required special
sample preparation where the grains were cut. Thus the measured diameters are not equal to the longest and shortest diameters of the original particle. This has caused problems in the inter-
pretation. Another problem is that grain-size distri-
butions from sieve analysis are based upon weight
percentage whereas grain-size distributions from
image analysis are based upon the percentage number of particles. Therefore, the distribution curves are incomparable, but there exist methods for transformation. A method for transformation from percentage number of particles into weight
percentage was presented by Auvinet (1989) and
methods for converting grain-size data from thin
sections to sieve analysis data were presented by
Friedman (1958, 1962) and Burger and Skala
(1973, 1976).
Information from the image analysis gives addiral and crushed aggregate. Confidence intervals, of 95%, for the
means of Fshape are shown. Grey symbols mark natural materials and black symbols mark crushed materials.information about the properties of aggregate particles. In this study a methodology using
image analysis and microscopy has been developed
and used for the analysis of particle-size and shape
properties of fine aggregate.